Update CHANGELOG.md

Author: lukasmerten

CHANGELOG.md

@@ -8,7 +8,7 @@
 
 ### New features:
 * Added new backwards-compatible function particleMass that returns particle mass also for non-nuclei
-* Added the new Galactic magnetic field models from Unger&Farrar arXiv:2311.12120
+* Added the new Galactic magnetic field models from Unger&Farrar arXiv:2311.12120 and Korochkin et al. arXiv:2407.02148
 * Added EBL model from Finke et al. 2022
 * Added overridable getTime function to ObserverTimeEvolution which is called instead of detList. 
   Old functionalities are preserved by adding old functions and setter/getter functions.